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prim.cpp
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prim.cpp
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/***************************************************************************
prim.c - description
-------------------
begin : Sun Mar 08 2009
copyright : (C) 1999-2009 by Pete Bernert
web : www.pbernert.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. See also the license.txt file for *
* additional informations. *
* *
***************************************************************************/
#include "externals.h"
////////////////////////////////////////////////////////////////////////
// globals
////////////////////////////////////////////////////////////////////////
static bool bDrawTextured; // current active drawing states
static bool bDrawSmoothShaded;
static bool bOldSmoothShaded;
static bool bDrawNonShaded;
bool bDrawMultiPass;
int32_t iDrawnSomething = 0;
bool bRenderFrontBuffer = false; // flag for front buffer rendering
GLubyte ubGloAlpha; // texture alpha
GLubyte ubGloColAlpha; // color alpha
bool bFullVRam = false; // sign for tex win
GLuint gTexName; // binded texture
bool bTexEnabled; // texture enable flag
static bool bBlendEnable; // blend enable flag
PSXRect_t xrUploadArea; // rect to upload
PSXRect_t xrUploadAreaIL; // rect to upload
static PSXRect_t xrUploadAreaRGB24; // rect to upload rgb24
int32_t iSpriteTex = 0; // flag for "hey, it's a sprite"
uint16_t usMirror; // mirror, mirror on the wall
bool bNeedUploadAfter = false; // sign for uploading in next frame
bool bNeedUploadTest = false; // sign for upload test
bool bUsingTWin = false; // tex win active flag
static bool bUsingMovie = false; // movie active flag
PSXRect_t xrMovieArea; // rect for movie upload
static int16_t sSprite_ux2; // needed for sprire adjust
static int16_t sSprite_vy2; //
static uint32_t ulClutID; // clut
int32_t drawX, drawY, drawW, drawH; // offscreen drawing checkers
int16_t sxmin, sxmax, symin, symax;
////////////////////////////////////////////////////////////////////////
// Offset stuff
////////////////////////////////////////////////////////////////////////
// please note: it is hardly do-able in a hw/accel plugin to get the
// real psx polygon coord mapping right... the following
// works not to bad with many games, though
static __inline bool CheckCoord4()
{
if (lx0 < 0)
{
if (((lx1 - lx0) > CHKMAX_X) || ((lx2 - lx0) > CHKMAX_X))
{
if (lx3 < 0)
{
if ((lx1 - lx3) > CHKMAX_X)
return true;
if ((lx2 - lx3) > CHKMAX_X)
return true;
}
}
}
if (lx1 < 0)
{
if ((lx0 - lx1) > CHKMAX_X)
return true;
if ((lx2 - lx1) > CHKMAX_X)
return true;
if ((lx3 - lx1) > CHKMAX_X)
return true;
}
if (lx2 < 0)
{
if ((lx0 - lx2) > CHKMAX_X)
return true;
if ((lx1 - lx2) > CHKMAX_X)
return true;
if ((lx3 - lx2) > CHKMAX_X)
return true;
}
if (lx3 < 0)
{
if (((lx1 - lx3) > CHKMAX_X) || ((lx2 - lx3) > CHKMAX_X))
{
if (lx0 < 0)
{
if ((lx1 - lx0) > CHKMAX_X)
return true;
if ((lx2 - lx0) > CHKMAX_X)
return true;
}
}
}
if (ly0 < 0)
{
if ((ly1 - ly0) > CHKMAX_Y)
return true;
if ((ly2 - ly0) > CHKMAX_Y)
return true;
}
if (ly1 < 0)
{
if ((ly0 - ly1) > CHKMAX_Y)
return true;
if ((ly2 - ly1) > CHKMAX_Y)
return true;
if ((ly3 - ly1) > CHKMAX_Y)
return true;
}
if (ly2 < 0)
{
if ((ly0 - ly2) > CHKMAX_Y)
return true;
if ((ly1 - ly2) > CHKMAX_Y)
return true;
if ((ly3 - ly2) > CHKMAX_Y)
return true;
}
if (ly3 < 0)
{
if ((ly1 - ly3) > CHKMAX_Y)
return true;
if ((ly2 - ly3) > CHKMAX_Y)
return true;
}
return false;
}
static __inline bool CheckCoord3()
{
if (lx0 < 0)
{
if ((lx1 - lx0) > CHKMAX_X)
return true;
if ((lx2 - lx0) > CHKMAX_X)
return true;
}
if (lx1 < 0)
{
if ((lx0 - lx1) > CHKMAX_X)
return true;
if ((lx2 - lx1) > CHKMAX_X)
return true;
}
if (lx2 < 0)
{
if ((lx0 - lx2) > CHKMAX_X)
return true;
if ((lx1 - lx2) > CHKMAX_X)
return true;
}
if (ly0 < 0)
{
if ((ly1 - ly0) > CHKMAX_Y)
return true;
if ((ly2 - ly0) > CHKMAX_Y)
return true;
}
if (ly1 < 0)
{
if ((ly0 - ly1) > CHKMAX_Y)
return true;
if ((ly2 - ly1) > CHKMAX_Y)
return true;
}
if (ly2 < 0)
{
if ((ly0 - ly2) > CHKMAX_Y)
return true;
if ((ly1 - ly2) > CHKMAX_Y)
return true;
}
return false;
}
static __inline bool CheckCoord2()
{
if (lx0 < 0)
{
if ((lx1 - lx0) > CHKMAX_X)
return true;
}
if (lx1 < 0)
{
if ((lx0 - lx1) > CHKMAX_X)
return true;
}
if (ly0 < 0)
{
if ((ly1 - ly0) > CHKMAX_Y)
return true;
}
if (ly1 < 0)
{
if ((ly0 - ly1) > CHKMAX_Y)
return true;
}
return false;
}
////////////////////////////////////////////////////////////////////////
// POLYGON OFFSET FUNCS
////////////////////////////////////////////////////////////////////////
static void offsetPSXLine(void)
{
int16_t x0, x1, y0, y1, dx, dy;
float px, py;
x0 = lx0 + 1 + PSXDisplay.DrawOffset.x;
x1 = lx1 + 1 + PSXDisplay.DrawOffset.x;
y0 = ly0 + 1 + PSXDisplay.DrawOffset.y;
y1 = ly1 + 1 + PSXDisplay.DrawOffset.y;
dx = x1 - x0;
dy = y1 - y0;
// tricky line width without sqrt
if (dx >= 0)
{
if (dy >= 0)
{
px = 0.5f;
if (dx > dy)
py = -0.5f;
else if (dx < dy)
py = 0.5f;
else
py = 0.0f;
}
else
{
py = -0.5f;
dy = -dy;
if (dx > dy)
px = 0.5f;
else if (dx < dy)
px = -0.5f;
else
px = 0.0f;
}
}
else
{
if (dy >= 0)
{
py = 0.5f;
dx = -dx;
if (dx > dy)
px = -0.5f;
else if (dx < dy)
px = 0.5f;
else
px = 0.0f;
}
else
{
px = -0.5f;
if (dx > dy)
py = -0.5f;
else if (dx < dy)
py = 0.5f;
else
py = 0.0f;
}
}
lx0 = (int16_t)((float)x0 - px);
lx3 = (int16_t)((float)x0 + py);
ly0 = (int16_t)((float)y0 - py);
ly3 = (int16_t)((float)y0 - px);
lx1 = (int16_t)((float)x1 - py);
lx2 = (int16_t)((float)x1 + px);
ly1 = (int16_t)((float)y1 + px);
ly2 = (int16_t)((float)y1 + py);
}
static void offsetPSX3(void)
{
lx0 += PSXDisplay.DrawOffset.x;
ly0 += PSXDisplay.DrawOffset.y;
lx1 += PSXDisplay.DrawOffset.x;
ly1 += PSXDisplay.DrawOffset.y;
lx2 += PSXDisplay.DrawOffset.x;
ly2 += PSXDisplay.DrawOffset.y;
}
static void offsetPSX4(void)
{
lx0 += PSXDisplay.DrawOffset.x;
ly0 += PSXDisplay.DrawOffset.y;
lx1 += PSXDisplay.DrawOffset.x;
ly1 += PSXDisplay.DrawOffset.y;
lx2 += PSXDisplay.DrawOffset.x;
ly2 += PSXDisplay.DrawOffset.y;
lx3 += PSXDisplay.DrawOffset.x;
ly3 += PSXDisplay.DrawOffset.y;
}
static bool offsetline(void)
{
int16_t x0, x1, y0, y1, dx, dy;
float px, py;
if (bDisplayNotSet)
SetOGLDisplaySettings(1);
lx0 = (int16_t)(((int32_t)lx0 << SIGNSHIFT) >> SIGNSHIFT);
lx1 = (int16_t)(((int32_t)lx1 << SIGNSHIFT) >> SIGNSHIFT);
ly0 = (int16_t)(((int32_t)ly0 << SIGNSHIFT) >> SIGNSHIFT);
ly1 = (int16_t)(((int32_t)ly1 << SIGNSHIFT) >> SIGNSHIFT);
if (CheckCoord2())
return true;
x0 = (lx0 + PSXDisplay.CumulOffset.x) + 1;
x1 = (lx1 + PSXDisplay.CumulOffset.x) + 1;
y0 = (ly0 + PSXDisplay.CumulOffset.y) + 1;
y1 = (ly1 + PSXDisplay.CumulOffset.y) + 1;
dx = x1 - x0;
dy = y1 - y0;
if (dx >= 0)
{
if (dy >= 0)
{
px = 0.5f;
if (dx > dy)
py = -0.5f;
else if (dx < dy)
py = 0.5f;
else
py = 0.0f;
}
else
{
py = -0.5f;
dy = -dy;
if (dx > dy)
px = 0.5f;
else if (dx < dy)
px = -0.5f;
else
px = 0.0f;
}
}
else
{
if (dy >= 0)
{
py = 0.5f;
dx = -dx;
if (dx > dy)
px = -0.5f;
else if (dx < dy)
px = 0.5f;
else
px = 0.0f;
}
else
{
px = -0.5f;
if (dx > dy)
py = -0.5f;
else if (dx < dy)
py = 0.5f;
else
py = 0.0f;
}
}
vertex[0].x = (int16_t)((float)x0 - px);
vertex[3].x = (int16_t)((float)x0 + py);
vertex[0].y = (int16_t)((float)y0 - py);
vertex[3].y = (int16_t)((float)y0 - px);
vertex[1].x = (int16_t)((float)x1 - py);
vertex[2].x = (int16_t)((float)x1 + px);
vertex[1].y = (int16_t)((float)y1 + px);
vertex[2].y = (int16_t)((float)y1 + py);
if (vertex[0].x == vertex[3].x && // ortho rect? done
vertex[1].x == vertex[2].x && vertex[0].y == vertex[1].y && vertex[2].y == vertex[3].y)
return false;
if (vertex[0].x == vertex[1].x && vertex[2].x == vertex[3].x && vertex[0].y == vertex[3].y &&
vertex[1].y == vertex[2].y)
return false;
return false;
}
static bool offset3(void)
{
if (bDisplayNotSet)
SetOGLDisplaySettings(1);
lx0 = (int16_t)(((int32_t)lx0 << SIGNSHIFT) >> SIGNSHIFT);
lx1 = (int16_t)(((int32_t)lx1 << SIGNSHIFT) >> SIGNSHIFT);
lx2 = (int16_t)(((int32_t)lx2 << SIGNSHIFT) >> SIGNSHIFT);
ly0 = (int16_t)(((int32_t)ly0 << SIGNSHIFT) >> SIGNSHIFT);
ly1 = (int16_t)(((int32_t)ly1 << SIGNSHIFT) >> SIGNSHIFT);
ly2 = (int16_t)(((int32_t)ly2 << SIGNSHIFT) >> SIGNSHIFT);
if (CheckCoord3())
return true;
vertex[0].x = lx0;
vertex[0].y = ly0;
vertex[1].x = lx1;
vertex[1].y = ly1;
vertex[2].x = lx2;
vertex[2].y = ly2;
vertex[0].x += PSXDisplay.CumulOffset.x;
vertex[1].x += PSXDisplay.CumulOffset.x;
vertex[2].x += PSXDisplay.CumulOffset.x;
vertex[0].y += PSXDisplay.CumulOffset.y;
vertex[1].y += PSXDisplay.CumulOffset.y;
vertex[2].y += PSXDisplay.CumulOffset.y;
return false;
}
static bool offset4(void)
{
if (bDisplayNotSet)
SetOGLDisplaySettings(1);
lx0 = (int16_t)(((int32_t)lx0 << SIGNSHIFT) >> SIGNSHIFT);
lx1 = (int16_t)(((int32_t)lx1 << SIGNSHIFT) >> SIGNSHIFT);
lx2 = (int16_t)(((int32_t)lx2 << SIGNSHIFT) >> SIGNSHIFT);
lx3 = (int16_t)(((int32_t)lx3 << SIGNSHIFT) >> SIGNSHIFT);
ly0 = (int16_t)(((int32_t)ly0 << SIGNSHIFT) >> SIGNSHIFT);
ly1 = (int16_t)(((int32_t)ly1 << SIGNSHIFT) >> SIGNSHIFT);
ly2 = (int16_t)(((int32_t)ly2 << SIGNSHIFT) >> SIGNSHIFT);
ly3 = (int16_t)(((int32_t)ly3 << SIGNSHIFT) >> SIGNSHIFT);
if (CheckCoord4())
return true;
vertex[0].x = lx0;
vertex[0].y = ly0;
vertex[1].x = lx1;
vertex[1].y = ly1;
vertex[2].x = lx2;
vertex[2].y = ly2;
vertex[3].x = lx3;
vertex[3].y = ly3;
vertex[0].x += PSXDisplay.CumulOffset.x;
vertex[1].x += PSXDisplay.CumulOffset.x;
vertex[2].x += PSXDisplay.CumulOffset.x;
vertex[3].x += PSXDisplay.CumulOffset.x;
vertex[0].y += PSXDisplay.CumulOffset.y;
vertex[1].y += PSXDisplay.CumulOffset.y;
vertex[2].y += PSXDisplay.CumulOffset.y;
vertex[3].y += PSXDisplay.CumulOffset.y;
return false;
}
static void offsetST(void)
{
if (bDisplayNotSet)
SetOGLDisplaySettings(1);
lx0 = (int16_t)(((int32_t)lx0 << SIGNSHIFT) >> SIGNSHIFT);
ly0 = (int16_t)(((int32_t)ly0 << SIGNSHIFT) >> SIGNSHIFT);
if (lx0 < -512 && PSXDisplay.DrawOffset.x <= -512)
lx0 += 2048;
if (ly0 < -512 && PSXDisplay.DrawOffset.y <= -512)
ly0 += 2048;
ly1 = ly0;
ly2 = ly3 = ly0 + sprtH;
lx3 = lx0;
lx1 = lx2 = lx0 + sprtW;
vertex[0].x = lx0 + PSXDisplay.CumulOffset.x;
vertex[1].x = lx1 + PSXDisplay.CumulOffset.x;
vertex[2].x = lx2 + PSXDisplay.CumulOffset.x;
vertex[3].x = lx3 + PSXDisplay.CumulOffset.x;
vertex[0].y = ly0 + PSXDisplay.CumulOffset.y;
vertex[1].y = ly1 + PSXDisplay.CumulOffset.y;
vertex[2].y = ly2 + PSXDisplay.CumulOffset.y;
vertex[3].y = ly3 + PSXDisplay.CumulOffset.y;
}
static void offsetScreenUpload(int32_t Position)
{
if (bDisplayNotSet)
SetOGLDisplaySettings(1);
if (Position == -1)
{
int32_t lmdx, lmdy;
lmdx = xrUploadArea.x0;
lmdy = xrUploadArea.y0;
lx0 -= lmdx;
ly0 -= lmdy;
lx1 -= lmdx;
ly1 -= lmdy;
lx2 -= lmdx;
ly2 -= lmdy;
lx3 -= lmdx;
ly3 -= lmdy;
}
else if (Position)
{
lx0 -= PSXDisplay.DisplayPosition.x;
ly0 -= PSXDisplay.DisplayPosition.y;
lx1 -= PSXDisplay.DisplayPosition.x;
ly1 -= PSXDisplay.DisplayPosition.y;
lx2 -= PSXDisplay.DisplayPosition.x;
ly2 -= PSXDisplay.DisplayPosition.y;
lx3 -= PSXDisplay.DisplayPosition.x;
ly3 -= PSXDisplay.DisplayPosition.y;
}
else
{
lx0 -= PreviousPSXDisplay.DisplayPosition.x;
ly0 -= PreviousPSXDisplay.DisplayPosition.y;
lx1 -= PreviousPSXDisplay.DisplayPosition.x;
ly1 -= PreviousPSXDisplay.DisplayPosition.y;
lx2 -= PreviousPSXDisplay.DisplayPosition.x;
ly2 -= PreviousPSXDisplay.DisplayPosition.y;
lx3 -= PreviousPSXDisplay.DisplayPosition.x;
ly3 -= PreviousPSXDisplay.DisplayPosition.y;
}
vertex[0].x = lx0 + PreviousPSXDisplay.Range.x0;
vertex[1].x = lx1 + PreviousPSXDisplay.Range.x0;
vertex[2].x = lx2 + PreviousPSXDisplay.Range.x0;
vertex[3].x = lx3 + PreviousPSXDisplay.Range.x0;
vertex[0].y = ly0 + PreviousPSXDisplay.Range.y0;
vertex[1].y = ly1 + PreviousPSXDisplay.Range.y0;
vertex[2].y = ly2 + PreviousPSXDisplay.Range.y0;
vertex[3].y = ly3 + PreviousPSXDisplay.Range.y0;
}
static void offsetBlk(void)
{
if (bDisplayNotSet)
SetOGLDisplaySettings(1);
vertex[0].x = lx0 - PSXDisplay.GDrawOffset.x + PreviousPSXDisplay.Range.x0;
vertex[1].x = lx1 - PSXDisplay.GDrawOffset.x + PreviousPSXDisplay.Range.x0;
vertex[2].x = lx2 - PSXDisplay.GDrawOffset.x + PreviousPSXDisplay.Range.x0;
vertex[3].x = lx3 - PSXDisplay.GDrawOffset.x + PreviousPSXDisplay.Range.x0;
vertex[0].y = ly0 - PSXDisplay.GDrawOffset.y + PreviousPSXDisplay.Range.y0;
vertex[1].y = ly1 - PSXDisplay.GDrawOffset.y + PreviousPSXDisplay.Range.y0;
vertex[2].y = ly2 - PSXDisplay.GDrawOffset.y + PreviousPSXDisplay.Range.y0;
vertex[3].y = ly3 - PSXDisplay.GDrawOffset.y + PreviousPSXDisplay.Range.y0;
}
static void assignTextureVRAMWrite(void)
{
if (gl_ux[1] == 255)
{
vertex[0].sow = (gl_ux[0] * 255.99f) / 255.0f;
vertex[1].sow = (gl_ux[1] * 255.99f) / 255.0f;
vertex[2].sow = (gl_ux[2] * 255.99f) / 255.0f;
vertex[3].sow = (gl_ux[3] * 255.99f) / 255.0f;
}
else
{
vertex[0].sow = gl_ux[0];
vertex[1].sow = gl_ux[1];
vertex[2].sow = gl_ux[2];
vertex[3].sow = gl_ux[3];
}
vertex[0].tow = gl_vy[0];
vertex[1].tow = gl_vy[1];
vertex[2].tow = gl_vy[2];
vertex[3].tow = gl_vy[3];
}
static GLuint gLastTex = 0;
/////////////////////////////////////////////////////////
static void assignTextureSprite(void)
{
if (bUsingTWin)
{
vertex[0].sow = vertex[3].sow = (float)gl_ux[0] / TWin.UScaleFactor;
vertex[1].sow = vertex[2].sow = (float)sSprite_ux2 / TWin.UScaleFactor;
vertex[0].tow = vertex[1].tow = (float)gl_vy[0] / TWin.VScaleFactor;
vertex[2].tow = vertex[3].tow = (float)sSprite_vy2 / TWin.VScaleFactor;
gLastTex = gTexName;
}
else
{
vertex[0].sow = vertex[3].sow = gl_ux[0];
vertex[1].sow = vertex[2].sow = sSprite_ux2;
vertex[0].tow = vertex[1].tow = gl_vy[0];
vertex[2].tow = vertex[3].tow = sSprite_vy2;
}
if (usMirror & 0x1000)
{
vertex[0].sow = vertex[1].sow;
vertex[1].sow = vertex[2].sow = vertex[3].sow;
vertex[3].sow = vertex[0].sow;
}
if (usMirror & 0x2000)
{
vertex[0].tow = vertex[3].tow;
vertex[2].tow = vertex[3].tow = vertex[1].tow;
vertex[1].tow = vertex[0].tow;
}
}
/////////////////////////////////////////////////////////
static void assignTexture3(void)
{
if (bUsingTWin)
{
vertex[0].sow = (float)gl_ux[0] / TWin.UScaleFactor;
vertex[0].tow = (float)gl_vy[0] / TWin.VScaleFactor;
vertex[1].sow = (float)gl_ux[1] / TWin.UScaleFactor;
vertex[1].tow = (float)gl_vy[1] / TWin.VScaleFactor;
vertex[2].sow = (float)gl_ux[2] / TWin.UScaleFactor;
vertex[2].tow = (float)gl_vy[2] / TWin.VScaleFactor;
gLastTex = gTexName;
}
else
{
vertex[0].sow = gl_ux[0];
vertex[0].tow = gl_vy[0];
vertex[1].sow = gl_ux[1];
vertex[1].tow = gl_vy[1];
vertex[2].sow = gl_ux[2];
vertex[2].tow = gl_vy[2];
}
}
/////////////////////////////////////////////////////////
static void assignTexture4(void)
{
if (bUsingTWin)
{
vertex[0].sow = (float)gl_ux[0] / TWin.UScaleFactor;
vertex[0].tow = (float)gl_vy[0] / TWin.VScaleFactor;
vertex[1].sow = (float)gl_ux[1] / TWin.UScaleFactor;
vertex[1].tow = (float)gl_vy[1] / TWin.VScaleFactor;
vertex[2].sow = (float)gl_ux[2] / TWin.UScaleFactor;
vertex[2].tow = (float)gl_vy[2] / TWin.VScaleFactor;
vertex[3].sow = (float)gl_ux[3] / TWin.UScaleFactor;
vertex[3].tow = (float)gl_vy[3] / TWin.VScaleFactor;
gLastTex = gTexName;
}
else
{
vertex[0].sow = gl_ux[0];
vertex[0].tow = gl_vy[0];
vertex[1].sow = gl_ux[1];
vertex[1].tow = gl_vy[1];
vertex[2].sow = gl_ux[2];
vertex[2].tow = gl_vy[2];
vertex[3].sow = gl_ux[3];
vertex[3].tow = gl_vy[3];
}
}
////////////////////////////////////////////////////////////////////////
// Update global TP infos
////////////////////////////////////////////////////////////////////////
static void UpdateGlobalTP(uint16_t gdata)
{
GlobalTextAddrX = (gdata << 6) & 0x3c0;
if (iGPUHeight == 1024) // ZN mode
{
if (dwGPUVersion == 2) // very special zn gpu
{
GlobalTextAddrY = ((gdata & 0x60) << 3);
GlobalTextIL = (gdata & 0x2000) >> 13;
GlobalTextABR = (uint16_t)((gdata >> 7) & 0x3);
GlobalTextTP = (gdata >> 9) & 0x3;
if (GlobalTextTP == 3)
GlobalTextTP = 2;
GlobalTexturePage = (GlobalTextAddrX >> 6) + (GlobalTextAddrY >> 4);
usMirror = 0;
STATUSREG = (STATUSREG & 0xffffe000) | (gdata & 0x1fff);
return;
}
else // "enhanced" psx gpu
{
GlobalTextAddrY = (uint16_t)(((gdata << 4) & 0x100) | ((gdata >> 2) & 0x200));
}
}
else
GlobalTextAddrY = (gdata << 4) & 0x100; // "normal" psx gpu
usMirror = gdata & 0x3000;
GlobalTextTP = (gdata >> 7) & 0x3; // tex mode (4,8,15)
if (GlobalTextTP == 3)
GlobalTextTP = 2; // seen in Wild9 :(
GlobalTextABR = (gdata >> 5) & 0x3; // blend mode
GlobalTexturePage = (GlobalTextAddrX >> 6) + (GlobalTextAddrY >> 4);
STATUSREG &= ~0x07ff; // Clear the necessary bits
STATUSREG |= (gdata & 0x07ff); // set the necessary bits
}
static uint32_t DoubleBGR2RGB(uint32_t BGR)
{
uint32_t ebx, eax, edx;
ebx = (BGR & 0x000000ff) << 1;
if (ebx & 0x00000100)
ebx = 0x000000ff;
eax = (BGR & 0x0000ff00) << 1;
if (eax & 0x00010000)
eax = 0x0000ff00;
edx = (BGR & 0x00ff0000) << 1;
if (edx & 0x01000000)
edx = 0x00ff0000;
return (ebx | eax | edx);
}
static uint16_t BGR24to16(uint32_t BGR)
{
return ((BGR >> 3) & 0x1f) | ((BGR & 0xf80000) >> 9) | ((BGR & 0xf800) >> 6);
}
////////////////////////////////////////////////////////////////////////
// OpenGL primitive drawing commands
////////////////////////////////////////////////////////////////////////
static __inline void PRIMdrawMain(GLenum mode, int32_t howMany, bool enableColor, bool enableVertex, bool enableTextureCoord, OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3, OGLVertex *vertex4)
{
if (enableColor)
glEnableClientState(GL_COLOR_ARRAY);
else
glDisableClientState(GL_COLOR_ARRAY);
if (enableVertex)
glEnableClientState(GL_VERTEX_ARRAY);
else
glDisableClientState(GL_VERTEX_ARRAY);
if (enableTextureCoord)
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
else
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
OGLVertex vertexToDraw[4];
vertexToDraw[0] = *vertex1;
vertexToDraw[1] = *vertex2;
vertexToDraw[2] = *vertex3;
if (howMany == 4)
vertexToDraw[3] = *vertex4;
if (enableColor)
glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(vertexToDraw[0]), &vertexToDraw[0].c.col[0]);
if (enableVertex)
glVertexPointer(3, GL_FLOAT, sizeof(vertexToDraw[0]), &vertexToDraw[0].x);
if (enableTextureCoord)
glTexCoordPointer(2, GL_FLOAT, sizeof(vertexToDraw[0]), &vertexToDraw[0].sow);
glDrawArrays(mode, 0, howMany);
}
static __inline void PRIMdrawTexturedQuad(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3,
OGLVertex *vertex4)
{
PRIMdrawMain(GL_TRIANGLE_STRIP, 4, false, true, true, vertex1, vertex2, vertex4, vertex3);
}
static __inline void PRIMdrawTexturedTri(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3)
{
PRIMdrawMain(GL_TRIANGLES, 3, false, true, true, vertex1, vertex2, vertex3, NULL);
}
static __inline void PRIMdrawTexGouraudTriColor(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3)
{
PRIMdrawMain(GL_TRIANGLES, 3, true, true, true, vertex1, vertex2, vertex3, NULL);
}
static __inline void PRIMdrawTexGouraudTriColorQuad(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3,
OGLVertex *vertex4)
{
PRIMdrawMain(GL_TRIANGLE_STRIP, 4, true, true, true, vertex1, vertex2, vertex4, vertex3);
}
static __inline void PRIMdrawTri(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3)
{
PRIMdrawMain(GL_TRIANGLES, 3, false, true, false, vertex1, vertex2, vertex3, NULL);
}
static __inline void PRIMdrawTri2(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3, OGLVertex *vertex4)
{
PRIMdrawMain(GL_TRIANGLE_STRIP, 4, false, true, false, vertex1, vertex3, vertex2, vertex4);
}
static __inline void PRIMdrawGouraudTriColor(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3)
{
PRIMdrawMain(GL_TRIANGLE_STRIP, 3, true, true, false, vertex1, vertex2, vertex3, NULL);
}
static __inline void PRIMdrawGouraudTri2Color(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3,
OGLVertex *vertex4)
{
PRIMdrawMain(GL_TRIANGLE_STRIP, 4, true, true, false, vertex1, vertex3, vertex2, vertex4);
}
static __inline void PRIMdrawFlatLine(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3, OGLVertex *vertex4)
{
glColor4ubv(vertex1->c.col);
PRIMdrawMain(GL_QUADS, 4, false, true, false, vertex1, vertex2, vertex3, vertex4);
}
static __inline void PRIMdrawGouraudLine(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3, OGLVertex *vertex4)
{
PRIMdrawMain(GL_QUADS, 4, true, true, false, vertex1, vertex2, vertex3, vertex4);
}
static __inline void PRIMdrawQuad(OGLVertex *vertex1, OGLVertex *vertex2, OGLVertex *vertex3, OGLVertex *vertex4)
{
PRIMdrawMain(GL_QUADS, 4, false, true, false, vertex1, vertex2, vertex3, vertex4);
}
////////////////////////////////////////////////////////////////////////
// Transparent blending settings
////////////////////////////////////////////////////////////////////////
static GLenum obm1 = GL_ZERO;
static GLenum obm2 = GL_ZERO;
typedef struct SEMITRANSTAG
{
GLenum srcFac;
GLenum dstFac;
GLubyte alpha;
} SemiTransParams;
static SemiTransParams TransSets[4] = {{GL_SRC_ALPHA, GL_SRC_ALPHA, 127},
{GL_ONE, GL_ONE, 255},
{GL_ZERO, GL_ONE_MINUS_SRC_COLOR, 255},
{GL_ONE_MINUS_SRC_ALPHA, GL_ONE, 192}};
////////////////////////////////////////////////////////////////////////
static void SetSemiTrans(void)
{
/*
* 0.5 x B + 0.5 x F
* 1.0 x B + 1.0 x F
* 1.0 x B - 1.0 x F
* 1.0 x B +0.25 x F
*/
if (!DrawSemiTrans) // no semi trans at all?
{
if (bBlendEnable)
{
glDisable(GL_BLEND);
bBlendEnable = false;
} // -> don't wanna blend
ubGloAlpha = ubGloColAlpha = 255; // -> full alpha
return; // -> and bye
}
ubGloAlpha = ubGloColAlpha = TransSets[GlobalTextABR].alpha;
if (!bBlendEnable)
{
glEnable(GL_BLEND);
bBlendEnable = true;
} // wanna blend
if (TransSets[GlobalTextABR].srcFac != obm1 || TransSets[GlobalTextABR].dstFac != obm2)
{
obm1 = TransSets[GlobalTextABR].srcFac;
obm2 = TransSets[GlobalTextABR].dstFac;
glBlendFunc(obm1, obm2); // set blend func
}
}
////////////////////////////////////////////////////////////////////////
// multi pass in old 'Advanced blending' mode... got it from Lewpy :)
////////////////////////////////////////////////////////////////////////
static SemiTransParams MultiTexTransSets[4][2] = {
{{GL_ONE, GL_SRC_ALPHA, 127}, {GL_SRC_ALPHA, GL_ONE, 127}},
{{GL_ONE, GL_SRC_ALPHA, 255}, {GL_SRC_ALPHA, GL_ONE, 255}},
{{GL_ZERO, GL_ONE_MINUS_SRC_COLOR, 255}, {GL_ZERO, GL_ONE_MINUS_SRC_COLOR, 255}},
{{GL_SRC_ALPHA, GL_ONE, 127}, {GL_ONE_MINUS_SRC_ALPHA, GL_ONE, 255}}};
////////////////////////////////////////////////////////////////////////
static SemiTransParams MultiColTransSets[4] = {{GL_ONE_MINUS_SRC_ALPHA, GL_SRC_ALPHA, 127},
{GL_ONE, GL_ONE, 255},
{GL_ZERO, GL_ONE_MINUS_SRC_COLOR, 255},
{GL_SRC_ALPHA, GL_ONE, 127}};
////////////////////////////////////////////////////////////////////////
static void SetSemiTransMulti(int32_t Pass)
{
static GLenum bm1 = GL_ZERO;
static GLenum bm2 = GL_ONE;
ubGloAlpha = 255;
ubGloColAlpha = 255;
// are we enabling SemiTransparent mode?
if (DrawSemiTrans)
{
if (bDrawTextured)
{
bm1 = MultiTexTransSets[GlobalTextABR][Pass].srcFac;
bm2 = MultiTexTransSets[GlobalTextABR][Pass].dstFac;
ubGloAlpha = MultiTexTransSets[GlobalTextABR][Pass].alpha;
}
// no texture
else
{
bm1 = MultiColTransSets[GlobalTextABR].srcFac;
bm2 = MultiColTransSets[GlobalTextABR].dstFac;
ubGloColAlpha = MultiColTransSets[GlobalTextABR].alpha;
}
}
// no shading
else
{
if (Pass == 0)
{
// disable blending
bm1 = GL_ONE;
bm2 = GL_ZERO;
}
else
{
// disable blending, but add src col a second time
bm1 = GL_ONE;
bm2 = GL_ONE;
}
}
if (!bBlendEnable)
{
glEnable(GL_BLEND);
bBlendEnable = true;
} // wanna blend
if (bm1 != obm1 || bm2 != obm2)
{
glBlendFunc(bm1, bm2); // set blend func
obm1 = bm1;
obm2 = bm2;